Forming and drilling machine



No. 6l3,'598. Patented Nov. I, I898.

w B.PEABSON.

FORMING AND DRILLING MACHINE.

' (Application filed .nm. 4, 1898.) (No Model. 4 Sheets-Sheet I.

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4 Sheets-Sheet 2.

(No Model.)

Patented Nov. I, I898.v

No. 613,598. I

W. B. PEARSON. rename AND DRILLING MACHINE.

(Application filed Jam 4, 189B.)

4 Sheets-Sheet (No Model.)

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(No Model.)

- Pa tented Nov. 1, I898. w. B. PEARSON.

FORMING AND DRILLING MACHINE.

(Application filed Jan. 4, 189B.)

' 4 Sheets-Sheet 4.

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WW -W ZZZ/672%? WQZidnB. fmnsdz UNITED STATES PATENT OFFICE.

WALTER B. PEARSON, OF CHICAGO, ILLINOIS.

FORMING AND DRILLING MACHINE.

SPECIFICATION forming part of Letters Patent N 0. 613,598, dated November 1, 1898.

Application filed January 4, 1898. i l 1% 665,570. (No model.)

To aZZ whom it may concern.-

Be it known that I, WALTER B. PEARSON, a citizen of the United States, and aresident of Chicago, in the county of Cook and State of Illinois, have invented an Improved Forming and Drilling Machine, of which the following is a specification.

' This invention relates to machinery particularly designed and adapted for making blanks for the hubs of bicycle-Wheels, and relates particularly to an improved back-rest adapted to support the work againstthe thrust of the forming-tool and to improved cut-off and necking mechanisms.

As it relates to the back-rest, the object of the invention is to provide a back-rest which will support the Work against the thrust of the forming-tool during its entire operation and which will also prevent the work from catching and riding upon the tool.

To this end my invention consists in providing a rest at the back of the work and another above the work, both' of which are formed or mounted upon slides, which are fitted to and movable in guides or ways formed in a suitable fixed and rigid support or frame, and in means to advance said slides toward the work at the same rate that the formingtool is fed into the work. In the preferable construction shown the rests consist of antifriction-rollers revolubly mounted on the slides, thus effectually preventing said rests from roughing up or gouging the work, as plain fixed surfaces would tend to do, particularly when heavy duty is required of the machine.

As the invention relates to an improved cut-off mechanism,the object of theinvention is primarily to economize time by starting the cut-ofi and forming tools into the work at substantially the same time and providing means to impart a differential movement to the cut-off tool, whereby it will be fed more rapidly than the forming-tool, so that they will both reach the ends of their cuts at the same time.

To this end my invention consists, in the preferable form thereof now known to me, of a cut-off-tool slide supported upon the forming-tool slide and connection between said cut-off and forming tool slides such that movement of the forming-tool slide will im=- part an accelerated movement in the same di rection to said cut-off-tool slide. As shown, the driving connection between said formingtool and cut-off-tool slides comprises a lever, one end of which is f ulcrumed upon the fixed saddle of the forming-tool slide, the other end of said lever being connected to the cutoff-tool slide and said lever being connected to the forming-tool slide, between its ends, by a link. As preferably constructed said lever is fulcrumed to the tool carriage or saddle by means of a segmental gear formed thereon, which engages a rack formed in said saddle. Preferably, also, the link connecting said lever to the forming-tool slide is secured to said lever by means of an open-sided slot, form ing in efiect a hook, thus making provision for conveniently disengaging said cut-oif-tool slide from the forming-tool slide in case it is desired to move it independently thereof.

As it relates to an improved necking mechanism, the object of the invention is to provide means to relieve the, necking-tool, which is comparatively weak and delicate, from all unnecessary duty.

To this end the invention consists in keeping the necking-tool back from the work until the forming-tool has almost finished its out and in then advancing said necking-tool into the work, the adjustment being such that they will reach the ends of their cuts together. As shown, the necking-tool is carried on a slide which is fitted to and movable in guides or ways formed in the horizontal back-rest slide and is actuated by means of a segmental gear, which engages a rack thereon and is secured to the hub of a pinion which engages a rack formed on said back-rest slide. The pitch diameter of said segmental gear is greater than that of the driving-pinion. 'It therefore follows that the necking-tool slide will move faster than the back-rest slide, so that by properly adjusting said necking-tool relatively to the work it may be kept out of the work during almost the entire cut of the forming-tool, being advanced into its out by its accelerated movement and finishing simultaneously with the forming-tool. Said necking tool will thus be subjected to very light duty in the manner desired.

The invention also consists of the various other features, combinations of features, and

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details of construction hereinafter described, and then pointed out in the claims.

In the accompanying drawings a machine embodying myinvention is fully illustrated.

Figure l is a top plan view of a machine embodying my invention. Fig. 2 is a sectional view thereof on the line 2 2 of Fig. 1. Fig. 3 is a rear view of the back-rest, showing the necking-tool slide and means for actuating the same. Fig. 4 is a plan section on the line 4 4 of Fig. 2, looking in the direction indicated by the arrows. Fig. 5 is a sectional View showing the relative positions of the cutting-tools and of the drill at the time the cutting-tools have reached the ends of their respective cuts, their initial positions relatively to the stock being shown in dotted lines. Fig. 6 is a detail view showing the means for actuating the necking-tool slides, and Fig. 7 is a sectional view of the work supporting chuck.

The following description of my improved forming and drilling machine is limited to a detailed description of the novel features thereof, as those features shown and not described are old and well known and will be readily and fully understood by those familiar with machines of this type from an inspection of the drawings.

I will first describe my improved back-rest. In the preferable form thereof shown a backrest embodying my invention comprises slides A A, both of which are fitted to and movable toward and from the work in suitable guides or ways formed on a support or frame A which, as shown, is adj ustably secured to the tool-slide saddle A Adjustably secured to the slides A A are blocks A, in which are revolubly mounted antifriction wheels or rollers A While I prefer to use the antifrictionrollers at all times and in all cases, it may be possible when light duty is required of the machine to substitute stationary bearing-surfaces therefor. As shown, the blocks A are secured to the slides A A by means of binding-screws a, which pass through slots formed therein and are threaded into said slides. Screws a, threaded through lugs (1 formed on the slides, are adapted to abut against the blocks A Said screws thus sustain substantially the entire thrust upon said blocks and also afford convenient means for adjusting said blocks to bring the rollers A carried thereon, into contact with the work.

My improved back-rest also comprises an automatic feed mechanism,whereby the slides A A will be advanced toward the Work at the same rate that the forming-tool is fed. As shown, the feed for the slide A consists of a nut A, secured thereto, which engages a screw-thread a formed on the feed-screw A of the tool-slide, said screws being of the same pitch, but opposite in lead.

The slide A is actuated from the slide A in the following manner: Formed on said slides or on rack-bars secured thereto are rack-teeth a, and loosely mounted upon pins or shafts of a, respectively, are gears a a which intermesh with each other and respectively engage the rack-teeth a on the slides A A. It is thus obvious that the back-rest slides will be advanced toward the work at the same rate that the forming-tool is fed forward and that the rollers thereon will be maintained in contact with the work and will support it, those 011 the slide A from the direct thrust of the forming-tool and those on the slide A against its tendency to spring or climb up.

I will next describe the means for supporting and operating the cut-off tool to efiect the objects of my invention as they relate thereto.

The cut-off tool is supported in a holder B, which is movable relatively to the formingtool slide. As shown, said cut-oif-tool holder B is movably secured to the side of the forming-tool slide by stud-bolts B, which pass through slots 1), formed in said holder 13, and are threaded into said forming-tool slide, and flanges b formed on which embrace the outer surface of said holder, all in a familiar manner. Preferably, also, the holder B has a groove b formed in the side thereof, which engages a tongue b 011 the forming-tool slide.

Movement toward and from the work is imparted to the out-oif-tool slide from the forming-tool slide by means of a lever B which is connected between its ends to the forming-tool slide and on opposite sides of said point of attachment to the forming-tool slide to the cut-oif-tool slide and to a rigid support. In the preferable construction shown said lever B is pivoted to a rearward extension of said cut-off-tool slide B and is fulcrumed upon the saddle of the forming-tool slide by means of a segmental gear 19 which engages teeth b formed on said saddle or on a rack-bar secured thereto. Preferably, also, the connection between said lever and the forming-tool slide is such that said lever may be readily detached from said slide, and the upper end of said lever is shaped to receive a wrench, thus affording means to move said cut-off-tool slide independently of said forming-tool slide. As shown, the connection between said lever B and the forming-tool slide is by means of a link B pivoted to said slide, a slot 19 in which is adapted to engage a pin or stud 12 secured in said lever.

It is obvious that with the construction described movement of the forming-tool slide will impart a greater movement to the cutoff-tool slide in the same direction. It is also obvious that the difference in the travel of said slides will depend entirely upon the relative lengths of the lever-arms. The relation of parts desired is such that the cutoff tool may be adjusted to start into its out either at the same time or after the forming-tool begins to out and will gradually be crowded ahead of the forming-tool, so that they will reach the ends of their cuts at the same time.

The necking-tool is carried on a slide G, fitted to and longitudinally movable in guides or Ways formed in the back-rest slide A, and a differential movement relatively to said back-rest slide and also to the forming-tool is imparted thereto from said back-rest slide in substantially the same manner that the cutoff-tool slide is actuatedby lever-arms of different lengths. In the specific construction shown the necking-tool slide is actuated by means of a lever O secured to asleeve formed on the gear or pinion a a segmental gear formed on which engages rack-teeth c,formed on the necking-tool slide or'on a rack-barsecured thereto. The pitch diameter of the segmental gear is greater than that of the gear a It is thus obvious that the movement imparted to said slide will be greater than that imparted to the slide A. It is thus possible, and the adjustment is such, that when the forming-tool begins to out said neckingtool will be away from the work, the relation being such that the necking-tool will be gradually advanced into its out and will finish simultaneously with the forming and cut-off tools.

As shown, the drill is driven directly from the back-gear shaft in the following manner: The back-gear shaft D of the machine is made to extend substantially the entire length of the bed, and its free end is splined to a gear D, a sleeve 01 on which is fitted to and revol'ubly secured in a bearing formed in a bracket D secured to and preferably formed integral with the drill-slide, thus forming a rigid support for said back-gear shaft. Rotary movement is imparted to the drill-spindle 1) directly from the back-gear shaft D by means of the gear D and gears D D onesecured to said drill-spindle and one to a stud cl, which is preferably secured in a slot diformed in the bracket D thus-making provision for changing gears to vary the speed ofthe drill.

The body of the chuck is formed integral with the live-spindle of the machine, forming an enlargement E thereon. Threaded to a hole or recess formed in the body of said chuck is a plug E, on which is formed the taper-surface 6, adapted to compress the collet E upon the work. The great advantages of this construction are that the chuck is stronger and stiffer and less liable to vibration and also that it occupies less room and brings the work nearer to the bearing in the head-stock than detachable chucks.

I claim- 1. In a forming-machine, the combination of horizontal slides arranged on opposite sides of the axial line of the machine-spindle, a vertical slide arranged above the axial line of said machine-spindle, a tool carried on the front horizontal slide and supporting-rests on the back horizontal slide and the vertical slide and means to impart movement to said slides toward and from the axial line of the machine-spindle, substantially as described.

2. In a forming-machine, the combination of horizontal slides arranged on opposite sides of the axial line of the machine-spindle, a

vertical slide arranged above the axial line of said machine-spindle, a tool carried on the front horizontal slide and back-rests on the back horizontal slide and on the vertical slide, said back-rests comprising antifriction-rollers mounted in suitable bearings formed on said slides and adapted to bear against the work and means to impart movement to said slides toward and from the axial line of said machine-spindle, substantially as described.

3. In a forming-machine, the combination of horizontal slides arranged on opposite sides of the axial line of the machine-spindle and a vertical slide arranged above the axial line of said machine-spindle, a tool carried on the front horizontal slide and back-rests on the back horizontal slide and on the vertical slide and connection between said slides such that movement of the tool-carrying slide will impart movement to said back-rest slides in the same direction, relatively to the axial line of the machine-spindle, substantially as de- 4 scribed.

,4. In a forming-machine, the combination of horizontal slides arranged on opposite sides of the axial line of the machine-spindle and a vertical slide arranged above the machinespindle, a tool carried on the front horizontal slide and back-rests on the back horizontal slide and on the vertical slide, said back-rests comprising antifriction-rollers mounted on said back-rest slidesand adapted to bear against the work, and connection between said slides such that movement of the toolcarrying slide will impart movement to the back-rest slides in the same direction, relatively to the axial line of the machine-spindle, substantially as described.

5. In a forming-machine, the combination of a tool-slide and a back-rest slide arranged on opposite sides of the axial line of the machine spindle and a back-rest slide arranged above the axial line of said spindle and connection between said slides such that movement of the tool-carrying slide will impart movement to the back-rest slides in the same direction, relatively to the axial line of the machine-spindle, the connection between the back-rest slides comprising racks on said slides and pinions which engage with said racks and also with each other, substantially as described.

6. A back-rest comprising slides mounted in fixed supports above and behind the work, on each of which a single worlrsupporting surface is formed, the relation and'adjustment of parts being such that the direction of movement of the work-supporting surfaces on the difierent slides will be on lines correspondingly disposed, relatively to the axial .line of the machine-spindle, connection between said slides and mechanism for imparting movement to one thereof, substantially as described.

7. A back-rest comprising slides mounted in fixed supports above and behind the work, on each ofwhich a single work-supporting surface is formed, the relation and adjustment of parts being such that the direction of movement of the work-supporting surfaces on the diiferent slides will be on lines correspondingly disposed, relatively to the axial line of the machine-spindle, racks formed on said slides and pinions which mesh with said racks and with each other and mechanism for imparting movement to one of said slides, substantially as described.

8. In a machine of the type described, the combination of a main-tool slide,asecondarytool slide and connection between said slides such that movement of said main-tool slide will impart a differential movement to said secondary tool slide, substantially as described.

9. In a machine of the type described, the combination of a main-tool slide, a secondarytool slide mounted in suitable ways or guides formed on said main-tool slide and connection between said slides such that movement of said niain-tool slide will imparta difierential movement to said secondary-tool slide, substantially as described.

10. In a machine of the type described, the combination of a main-tool slide, a secondarytool slide supported thereon, a lever fulcrumed upon a stationary support, one arm thereof being connected to the main-tool slide, and the other to the secondary-tool slide and the relation of parts being such that movement of said main-tool slide will impart a difierential movement to said secondarytool slide, substantially as described.

11. In a machine of the type described, the combination of a forming-tool slide, a cut-offtool slide fitted to suitable ways or guides on the forming-tool slide, a lever connected to said forming tool slide and on opposite side of its point of attachment to said formingtool slide to the cut-ofi-tool slide and to a stationary support, respectively, substantially as described.

12. In a machine of the type described, the

combination of a forming-tool slide, a cut-ofitool slide mounted on said forming-tool slide, a lever pivoted to said cut-oif-tool slide, a segmental gear thereon, which engages stationary rack-teeth and a link pivoted to the forming-tool slide, a slot in which is adapted to engage a pin or stud secured in said lever between said segmental gear and the point of attachment to the cut-oif-tool slide, the free end of said lever being shaped so as to receive a wrench, substantially as described.

13. In a machine of the type described, the combination of a forming-tool slide, and a back-rest slide arranged on opposite sides of the axial line of the machine, means to impart movement to said slides, toward and from the axial line of said machine, a necking-tool slide carried on said back-rest slide and pinions which are rigidly secured to each other and which respectively engage racks formed on said back-rest slide and on said necking-tool slide, the pitch diameter of the gear which engages with the necking-tool rack being greater than the pitch diameter of the pinion which engages with the backrest-slide rack, substantially as described.

14. In a machine of the type described, the combination of a main slide, means to impart movement thereto toward and from the axial line of the machine-spindle, a secondary slide mounted on said main slide, racks formed on said main and secondary slides and pinions having diflerent pitch diameters which are rigidly secured together and which respectively engage the racks formed on said main and secondary slides, substantially as described.

In testimony that I claim the foregoing as my invention I have hereunto set my hand this 16th day of December, 1897.

W'ALTER B. PEARSON.

Vitnesses:

Gno. ADAMS, SYDNEY R. BASTABLE. 

